Axminster loom



Sept. 11, 1934. w. w. ROBERTSON 3 AXMINSTER LOOM Original Filed 001;.24. 1932 3 Shets-Sheet 2 Sept. 11, 1934. w w ROBERTSON 1,973,357

. AXMINSTER LOOM Original Filed Oct. 24. 1932 3 Sheets-Sheet $5 )fmvfile I I fw v q/ I "'1 I y ,r' I z i: I 4 ll ,J/T/I/EM/WIP PatentedSept. 11, 1934 STATES FATE AXMINSTER LOOM Application October 24, 1932,Serial No. 639,257

Renewed February 9, 1934 3 Claims.

This invention relates to looms in which a pile or tufted fabric may beproduced, with the pattern clearly appearing on the back of the fabric.Such a loom is shown and described in the prior -5 application of Daceyand Robertson, Serial No.

. '15 yarn guidance.

In the preferred form, the guide-plates are caused to directly abut thereed dents, and are held for a predetermined-period inyieldingengagement therewith.

My invention further relates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appendedclaims.

A preferred form of the invention is shown in the drawings, in whichFig. 1 is a sectional side elevation showing parts of a loom embodyingmy improvements;

Fig. 2 is a sectional side elevation showing the spacer, reed dents andguide-plates on an enlarged scale;

Fig. 3 is a detail front elevation of certain parts, looking in thedirection of the arrow 3 in Fig. 2;

Fig. 4 is a detail plan view, looking in the direction of the arrow 4 inFig. 3;

Fig. 5 is an enlarged side elevation ofa portion of the actuating camwhich moves the guideplates;

Fig. 6 is an edge view of the cam, looking in the direction of the arrow6 in Fig. 5;

Fig. '7 is a detail sectional elevation, taken'along the line '7--7 inFig. 5, and

Figs. 8 to 13 are diagrammatic views showing the operation of the partsin forming a yarn loop and tuft.

Referring particularly to Figs. 1 to 4, I have shown portions of a loomwhich is in general of a usual Axminster type and comprises a frame 20,a breast beam 21, and a lay 22 mounted on arms 23 secured to a crossshaft 24 and oscillated by a 50 cam (not shown) which acts through a camlever 25.

A plurality of reed dents 26 are mounted on the lay 23 and are securedthereto in predetermined spaced relation by a lock plate 27 and aslotted 55 spacer bar 28. The usual yarn tubes T are transported by apattern chain C and are removed from the chain and presented to thefabric B by the usual arms or levers 32 which are actuated in the mannercustomary in this type of Axniinster looms. so spaced that they will dipbetween adjacent reed dents 26 during the insertion of the yarn ends andthe formation of the pile loops.

Front and rear pile-cutting knives 31 and 32 are mounted on knife-bars33 and 34 and these parts are actuated at predetermined times in theusual manner to sever the tuft yarn ends after a row of yarn loops hasbeen formed in the fabric. Binder warps W are drawn from warp beams orother usual sources of supply and pass between the reed dents 26 on thelay 22. i

A spacer or nose bar 40 is mounted in fixed position in the loom frame26 and extends across the loom in front of the reed dents 26. Parallelteeth 41 extend rearward from the nose bar 40 into the spaces betweenthe reed dents 26 and areprovided at their rear ends with inclined rearsurfaces 42 and hook-shaped projections 43. As shown in Fig. 4, thespaces between adjacent teeth 41 are wide enough to receive the dents 26and also to provide clearance for the binder warp threads W.

In addition to the reed dents 26 and teeth 41, there is also provided amovable cross bar 45 having a plurality of spaced parallel guide plates46, aligned with the reed dents 26 and adapted to enter between thefixed teeth 41 as indicated in Figs. 3 and 4.

The cross bar 45 is mounted on supports 47 secured to the forwardlyextending ends of arms 48, which arms in turn are mounted on a crossshaft 49 supported in fixed bearings in the loom frame 20. Consequentlythe cross bar 45 and guide plates 46 swing about the axis of the shaft49 as a pivot.

Lifter rods 50 are connected at their upper ends tothe cross bar 45 andat their lower ends to arms 51 mounted on a supporting shaft 52 (Fig. 1)having a depending actuating arm 53. This actuating arm is connected bya link 54 and giveway device 55 to a stud 56 in the upper end of a lever57.

A cam roll 58 on the lever 57 is engaged by an actuating cam 60 on theusual bottom or cam shaft 61 of the loom. The cam 60 ispreferably ofspecial construction and comprises a circular disc having a cam plate 62secured thereto at one point in its periphery. A contact member 63(Figs. 5 to '7) is pivoted at 64 to the cam plate 62 and is engaged atits lower end (as viewed in Yarn tubes Y on the tube frames T are Fig.5) by a stop screw 65 mounted in a projection 66 of the cam plate 62.

A spring 67 is seated in a pocket 68 (Fig. 7) of the cam plate 62 andyieldingly supports the upper end of the contact member 63, as indicatedin Fig. 5. The upper end portion of the contact member 63 is closelyadjacent to an abrupt shoulder 69 on the cam plate 62, and is insubstantial alignment with the outer edge of the cam plate but may beyieldingly depressed as will be hereinafter described.

The outer edge surface '76 (Fig. 1) of the cam plate 62 is preferablysubstantially concentric with the shaft 6i but with a wavy or irregularoutline, also for a purpose to be described.

Having described the details of my invention and its application to aloom of the type shown in the prior Dacey and Robertson application, themethod of operation of the loom and improvements may be brieflydescribed as follows, reference being made to Figs. 8 to 1 In Fig; 8 theparts are shown with the guideplates 46 in forward position and the reeddents 26 moved partially forward from the extreme rear positionindicated in dotted lines, which rear position the dents 26 occupyduring the insertion of the first filling pick F.

The reed dents 26 are moved further forward until the filling Fsubstantially engages the inclined rear faces 42 of the fixed teeth ll.The binder warps W are then crossed to hold the filling F inthis forwardposition, and the reed dents 26 move rearwardly to the position shown inFig. 9, while the yarn tubes Y simultaneously descend between the warpsW and also between the guide plat s as, which guide plates havesimultaneously begun their rearward movement.

This movement of the guide plates 46, combined with the rocking movementof the tube frame T and yarn tubes Y, causes the yarn ends E to be wipedbetween the guide plates 46, as indicated in broken and dotted lines inFig. 9.

During this wiping in of the yarn ends E, the wavy outline of theportion '76 of the cam plate 62 causes the guide plates 46 to receive avibrating or oscillating movement while in general rearward position, asindicated by full and broken lines in Fig. 9.-

The second piclr F of filling is then inserted as indicated Fig. 16 andthe reed dents 26 move forward to beat up the second pick F As the reeddents 26 continue their forward movement, the adjacent edges of the reeddents 26 and guide plates 46 engage each other, as indicated in Fig. 11,thus forming substantially continuous aisles for the yarn ends Y,preparatory to the loopforming operation indicated in Fig. 12.

The reed dents 26 continue their forward movement to force the fillingpicks F and F up the inclined faces 42 and over the hooks 43, while atthe same time the guide plates 46 move forward toward initial position.

The reed dents 26 again move rearwardly to permit insertion of the thirdfilling pick F which is thereafter beaten up by the reed dents 26. Theknives 31 and 32 are operated to sever the yarn ends which form thepile, and the tuft forming cycle is then complete.

For a more detailed and complete description of the loom operation,reference is made to the prior application above identified.

The advantages of my present improvement reside largely in the provisionof the yielding contact member 63 on the cam plate 62, by which yieldingmember the guide plates 46 and reed dents 26 are held in firm butyielding contact when in the position indicated in Fig. 11. This insuresa continuous aisle or passage between the parts 46 and 26, while at thesame time avoiding the possibility of injury which might result if theseparts were. both moved positively to abutting position. By the use ofthe yielding contact member 63, abutting contact of the parts 46 and 26may be readily achieved and may be maintained for a desired timeinterval.

Furthermore, the provision of the giveway device 55 in the connectionsbetween the cam 60 and the cross bar 45 permits the actuating lever 5'7to be entirely disconnected if any displacement of parts interferes withthe usual operative movement of the guide plates 46.

My improvements thus permit the machine to be operated more safely andalso render the .parts more efiective in guiding the yarn ends and inpreventing lateral displacement thereof.

, The specific construction of the cam 66 and cam plate 62 and themethod of operation thereof in oscillating the guide plates 66 is notclaimed herein, as this feature is not of my invention and is describedand claimed in a copending application of Edward J. Dacey, Serial No.665,917, filed April 13, 1933.

Having thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claims, but what I claim is:-

i. In an Axminster loom, a tube frame having a plurality of yarn tubesfrom which extend .yarn ends, a lay having a set of reed dents betweenwhich lie binder warps, a set of guide plates, each of which is alignedwith an associated reed dent, means to move said reed dents,

and additional yielding means to move said guide plates, whereby saiddents and plates are caused to relatively approach each other and toengage each other in yielding contact to define guide aisles for theyarn ends.

2. In an Axminster loom, a tube frame having a plurality of yarn tubesfrom which extend yarn ends, a lay having a set of re d dents betweenwhich lie binder warps, a set of guide plates, each of which is alignedwith an associated reed dent, means to move said reed dents,

additional yielding means to move said guide plates, whereby said dentsand plates are caused to relatively approach each other and to engageeach other in yielding contact to define guide aisles for the yarn ends,said additional yielding means including a cam having a yielding contactmember and a cam lever actuated thereby and connected to move said guideplates.

3. In an Axminster loom, a tube frame having a plurality of yarn tubesfrom which extend yarn ends, a lay having a set of reed dents betweenwhich lie binder warps, a set of guide plates, each of which is alignedwith an associated reed dent, means to move said reed dents, additionalmeans to move said guide-plates, whereby said dents and plates arecaused to relatively approach each other and to engage each other todefine guide aisles for the yarn ends, and a giveway connection betweensaid additional means and said guide plates.

WILLIAM W. ROBERTSON.

